Report Volume 6, PT. 1896

Report Volume 6, PT. 1896

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1897 edition. Excerpt: ...i.e. not yet cooled to the point of consolidation, pushed up through the Huronian rocks, more or less shattering them and dragging out ai I the'r pro-its own margin into the present schistose form. Before the process was comorigin. pleje the sheared edge of the mass was solid enough to allow the formation of great cavities between the layers of gneiss and mica schist. Here the fluids of the now solid but still hot granite could circulate, depositing the auriferous quartz. It seems likely that the dikes of granite and porphyry penetrated the Huronian diabase at an early stage, when portions of the interior of the granite magma were still fluid. No pegmatite dikes were found on Sultana island. Up to the present no gold bearing lenses have been found on the southern, southeastern or northeastern sides of the Sultana granite boss; nor have similarly arranged ore bodies been found at the margin of other areas of so oalled Laurentian. It would be surprising however if the example above described should turn out to be alone of its kind. THE STORY OF SILVER ISLET. Silver Islet is a speck upon the map of lake Superior. It is part of a introduction mining location of over 15,000 acres in land and water lots, or nearly 24 t0 tne Storvsquare miles, but as it existed thirty years ago its own area was only the seventh part of an acre. When the first discovery of silver wu made upon it in the summer of 1868 this islet was a rugged rock of 80 or 90 feet diameter. In outline it was not unlike a human skull, rising at its highest point six or eight feet above the lake level, and showing only a few square yards of vegetation. Yet the mine upon this islet was for fifteen years one of the world's famous mires; it gave employment summer and winter to hundreds of men;...
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Product details

  • Paperback | 116 pages
  • 189 x 246 x 6mm | 222g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123650979X
  • 9781236509796